dlls/wininet/netconnection.c

   1 /*
   2  * Wininet - networking layer
   3  *
   4  * Copyright 2002 TransGaming Technologies Inc.
   5  * Copyright 2013 Jacek Caban for CodeWeavers
   6  *
   7  * David Hammerton
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #define NONAMELESSUNION
  25
  26 #include "ws2tcpip.h"
  27
  28 #include <time.h>
  29 #include <stdarg.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34
  35 #include "wine/library.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "wininet.h"
  39 #include "winerror.h"
  40
  41 #include "wine/debug.h"
  42 #include "internet.h"
  43
  44 WINE_DEFAULT_DEBUG_CHANNEL(wininet);
  45
  46 static DWORD netconn_verify_cert(netconn_t *conn, PCCERT_CONTEXT cert, HCERTSTORE store)
  47 {
  48     BOOL ret;
  49     CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
  50     PCCERT_CHAIN_CONTEXT chain;
  51     char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
  52     char *server_auth[] = { oid_server_auth };
  53     DWORD err = ERROR_SUCCESS, errors;
  54
  55     static const DWORD supportedErrors =
  56         CERT_TRUST_IS_NOT_TIME_VALID |
  57         CERT_TRUST_IS_UNTRUSTED_ROOT |
  58         CERT_TRUST_IS_PARTIAL_CHAIN |
  59         CERT_TRUST_IS_NOT_SIGNATURE_VALID |
  60         CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
  61
  62     TRACE("verifying %s\n", debugstr_w(conn->server->name));
  63
  64     chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
  65     chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
  66     if (!(ret = CertGetCertificateChain(NULL, cert, NULL, store, &chainPara, 0, NULL, &chain))) {
  67         TRACE("failed\n");
  68         return GetLastError();
  69     }
  70
  71     errors = chain->TrustStatus.dwErrorStatus;
  72
  73     do {
  74         /* This seems strange, but that's what tests show */
  75         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
  76             WARN("ERROR_INTERNET_SEC_CERT_REV_FAILED\n");
  77             err = ERROR_INTERNET_SEC_CERT_REV_FAILED;
  78             if(conn->mask_errors)
  79                 conn->security_flags |= _SECURITY_FLAG_CERT_REV_FAILED;
  80             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION))
  81                 break;
  82         }
  83
  84         if (chain->TrustStatus.dwErrorStatus & ~supportedErrors) {
  85             WARN("error status %x\n", chain->TrustStatus.dwErrorStatus & ~supportedErrors);
  86             err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
  87             errors &= supportedErrors;
  88             if(!conn->mask_errors)
  89                 break;
  90             WARN("unknown error flags\n");
  91         }
  92
  93         if(errors & CERT_TRUST_IS_NOT_TIME_VALID) {
  94             WARN("CERT_TRUST_IS_NOT_TIME_VALID\n");
  95             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID)) {
  96                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_DATE_INVALID;
  97                 if(!conn->mask_errors)
  98                     break;
  99                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_DATE;
 100             }
 101             errors &= ~CERT_TRUST_IS_NOT_TIME_VALID;
 102         }
 103
 104         if(errors & CERT_TRUST_IS_UNTRUSTED_ROOT) {
 105             WARN("CERT_TRUST_IS_UNTRUSTED_ROOT\n");
 106             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 107                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 108                 if(!conn->mask_errors)
 109                     break;
 110                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 111             }
 112             errors &= ~CERT_TRUST_IS_UNTRUSTED_ROOT;
 113         }
 114
 115         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
 116             WARN("CERT_TRUST_IS_PARTIAL_CHAIN\n");
 117             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 118                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 119                 if(!conn->mask_errors)
 120                     break;
 121                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 122             }
 123             errors &= ~CERT_TRUST_IS_PARTIAL_CHAIN;
 124         }
 125
 126         if(errors & CERT_TRUST_IS_NOT_SIGNATURE_VALID) {
 127             WARN("CERT_TRUST_IS_NOT_SIGNATURE_VALID\n");
 128             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 129                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 130                 if(!conn->mask_errors)
 131                     break;
 132                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 133             }
 134             errors &= ~CERT_TRUST_IS_NOT_SIGNATURE_VALID;
 135         }
 136
 137         if(errors & CERT_TRUST_IS_NOT_VALID_FOR_USAGE) {
 138             WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE\n");
 139             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_WRONG_USAGE)) {
 140                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
 141                 if(!conn->mask_errors)
 142                     break;
 143                 WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE, unknown error flags\n");
 144             }
 145             errors &= ~CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
 146         }
 147
 148         if(err == ERROR_INTERNET_SEC_CERT_REV_FAILED) {
 149             assert(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION);
 150             err = ERROR_SUCCESS;
 151         }
 152     }while(0);
 153
 154     if(!err || conn->mask_errors) {
 155         CERT_CHAIN_POLICY_PARA policyPara;
 156         SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
 157         CERT_CHAIN_POLICY_STATUS policyStatus;
 158         CERT_CHAIN_CONTEXT chainCopy;
 159
 160         /* Clear chain->TrustStatus.dwErrorStatus so
 161          * CertVerifyCertificateChainPolicy will verify additional checks
 162          * rather than stopping with an existing, ignored error.
 163          */
 164         memcpy(&chainCopy, chain, sizeof(chainCopy));
 165         chainCopy.TrustStatus.dwErrorStatus = 0;
 166         sslExtraPolicyPara.u.cbSize = sizeof(sslExtraPolicyPara);
 167         sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
 168         sslExtraPolicyPara.pwszServerName = conn->server->name;
 169         sslExtraPolicyPara.fdwChecks = conn->security_flags;
 170         policyPara.cbSize = sizeof(policyPara);
 171         policyPara.dwFlags = 0;
 172         policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
 173         ret = CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL,
 174                 &chainCopy, &policyPara, &policyStatus);
 175         /* Any error in the policy status indicates that the
 176          * policy couldn't be verified.
 177          */
 178         if(ret) {
 179             if(policyStatus.dwError == CERT_E_CN_NO_MATCH) {
 180                 WARN("CERT_E_CN_NO_MATCH\n");
 181                 if(conn->mask_errors)
 182                     conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CN;
 183                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_CN_INVALID;
 184             }else if(policyStatus.dwError) {
 185                 WARN("policyStatus.dwError %x\n", policyStatus.dwError);
 186                 if(conn->mask_errors)
 187                     WARN("unknown error flags for policy status %x\n", policyStatus.dwError);
 188                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
 189             }
 190         }else {
 191             err = GetLastError();
 192         }
 193     }
 194
 195     if(err) {
 196         WARN("failed %u\n", err);
 197         CertFreeCertificateChain(chain);
 198         if(conn->server->cert_chain) {
 199             CertFreeCertificateChain(conn->server->cert_chain);
 200             conn->server->cert_chain = NULL;
 201         }
 202         if(conn->mask_errors)
 203             conn->server->security_flags |= conn->security_flags & _SECURITY_ERROR_FLAGS_MASK;
 204         return err;
 205     }
 206
 207     /* FIXME: Reuse cached chain */
 208     if(conn->server->cert_chain)
 209         CertFreeCertificateChain(chain);
 210     else
 211         conn->server->cert_chain = chain;
 212     return ERROR_SUCCESS;
 213 }
 214
 215 static SecHandle cred_handle, compat_cred_handle;
 216 static BOOL cred_handle_initialized, have_compat_cred_handle;
 217
 218 static CRITICAL_SECTION init_sechandle_cs;
 219 static CRITICAL_SECTION_DEBUG init_sechandle_cs_debug = {
 220     0, 0, &init_sechandle_cs,
 221     { &init_sechandle_cs_debug.ProcessLocksList,
 222       &init_sechandle_cs_debug.ProcessLocksList },
 223     0, 0, { (DWORD_PTR)(__FILE__ ": init_sechandle_cs") }
 224 };
 225 static CRITICAL_SECTION init_sechandle_cs = { &init_sechandle_cs_debug, -1, 0, 0, 0, 0 };
 226
 227 static BOOL ensure_cred_handle(void)
 228 {
 229     SECURITY_STATUS res = SEC_E_OK;
 230
 231     EnterCriticalSection(&init_sechandle_cs);
 232
 233     if(!cred_handle_initialized) {
 234         SCHANNEL_CRED cred = {SCHANNEL_CRED_VERSION};
 235         SecPkgCred_SupportedProtocols prots;
 236
 237         res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
 238                 NULL, NULL, &cred_handle, NULL);
 239         if(res == SEC_E_OK) {
 240             res = QueryCredentialsAttributesA(&cred_handle, SECPKG_ATTR_SUPPORTED_PROTOCOLS, &prots);
 241             if(res != SEC_E_OK || (prots.grbitProtocol & SP_PROT_TLS1_1PLUS_CLIENT)) {
 242                 cred.grbitEnabledProtocols = prots.grbitProtocol & ~SP_PROT_TLS1_1PLUS_CLIENT;
 243                 res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
 244                        NULL, NULL, &compat_cred_handle, NULL);
 245                 have_compat_cred_handle = res == SEC_E_OK;
 246             }
 247         }
 248
 249         cred_handle_initialized = res == SEC_E_OK;
 250     }
 251
 252     LeaveCriticalSection(&init_sechandle_cs);
 253
 254     if(res != SEC_E_OK) {
 255         WARN("Failed: %08x\n", res);
 256         return FALSE;
 257     }
 258
 259     return TRUE;
 260 }
 261
 262 static BOOL winsock_loaded = FALSE;
 263
 264 static BOOL WINAPI winsock_startup(INIT_ONCE *once, void *param, void **context)
 265 {
 266     WSADATA wsa_data;
 267     DWORD res;
 268
 269     res = WSAStartup(MAKEWORD(1,1), &wsa_data);
 270     if(res == ERROR_SUCCESS)
 271         winsock_loaded = TRUE;
 272     else
 273         ERR("WSAStartup failed: %u\n", res);
 274     return TRUE;
 275 }
 276
 277 void init_winsock(void)
 278 {
 279     static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
 280     InitOnceExecuteOnce(&init_once, winsock_startup, NULL, NULL);
 281 }
 282
 283 static void set_socket_blocking(netconn_t *conn, BOOL is_blocking)
 284 {
 285     if(conn->is_blocking != is_blocking) {
 286         ULONG arg = !is_blocking;
 287         ioctlsocket(conn->socket, FIONBIO, &arg);
 288     }
 289     conn->is_blocking = is_blocking;
 290 }
 291
 292 static DWORD create_netconn_socket(server_t *server, netconn_t *netconn, DWORD timeout)
 293 {
 294     int result;
 295     ULONG flag;
 296     DWORD res;
 297
 298     init_winsock();
 299
 300     assert(server->addr_len);
 301     result = netconn->socket = socket(server->addr.ss_family, SOCK_STREAM, 0);
 302     if(result != -1) {
 303         set_socket_blocking(netconn, FALSE);
 304         result = connect(netconn->socket, (struct sockaddr*)&server->addr, server->addr_len);
 305         if(result == -1)
 306         {
 307             res = WSAGetLastError();
 308             if (res == WSAEINPROGRESS || res == WSAEWOULDBLOCK) {
 309                 FD_SET set;
 310                 int res;
 311                 socklen_t len = sizeof(res);
 312                 TIMEVAL timeout_timeval = {0, timeout*1000};
 313
 314                 FD_ZERO(&set);
 315                 FD_SET(netconn->socket, &set);
 316                 res = select(netconn->socket+1, NULL, &set, NULL, &timeout_timeval);
 317                 if(!res || res == SOCKET_ERROR) {
 318                     closesocket(netconn->socket);
 319                     netconn->socket = -1;
 320                     return ERROR_INTERNET_CANNOT_CONNECT;
 321                 }
 322                 if (!getsockopt(netconn->socket, SOL_SOCKET, SO_ERROR, (void *)&res, &len) && !res)
 323                     result = 0;
 324             }
 325         }
 326         if(result == -1)
 327         {
 328             closesocket(netconn->socket);
 329             netconn->socket = -1;
 330         }
 331     }
 332     if(result == -1)
 333         return ERROR_INTERNET_CANNOT_CONNECT;
 334
 335     flag = 1;
 336     result = setsockopt(netconn->socket, IPPROTO_TCP, TCP_NODELAY, (void*)&flag, sizeof(flag));
 337     if(result < 0)
 338         WARN("setsockopt(TCP_NODELAY) failed\n");
 339
 340     return ERROR_SUCCESS;
 341 }
 342
 343 DWORD create_netconn(BOOL useSSL, server_t *server, DWORD security_flags, BOOL mask_errors, DWORD timeout, netconn_t **ret)
 344 {
 345     netconn_t *netconn;
 346     int result;
 347
 348     netconn = heap_alloc_zero(sizeof(*netconn));
 349     if(!netconn)
 350         return ERROR_OUTOFMEMORY;
 351
 352     netconn->socket = -1;
 353     netconn->security_flags = security_flags | server->security_flags;
 354     netconn->mask_errors = mask_errors;
 355     list_init(&netconn->pool_entry);
 356     SecInvalidateHandle(&netconn->ssl_ctx);
 357
 358     result = create_netconn_socket(server, netconn, timeout);
 359     if (result != ERROR_SUCCESS) {
 360         heap_free(netconn);
 361         return result;
 362     }
 363
 364     server_addref(server);
 365     netconn->server = server;
 366     *ret = netconn;
 367     return result;
 368 }
 369
 370 BOOL is_valid_netconn(netconn_t *netconn)
 371 {
 372     return netconn && netconn->socket != -1;
 373 }
 374
 375 void close_netconn(netconn_t *netconn)
 376 {
 377     closesocket(netconn->socket);
 378     netconn->socket = -1;
 379 }
 380
 381 void free_netconn(netconn_t *netconn)
 382 {
 383     server_release(netconn->server);
 384
 385     if (netconn->secure) {
 386         heap_free(netconn->peek_msg_mem);
 387         netconn->peek_msg_mem = NULL;
 388         netconn->peek_msg = NULL;
 389         netconn->peek_len = 0;
 390         heap_free(netconn->ssl_buf);
 391         netconn->ssl_buf = NULL;
 392         heap_free(netconn->extra_buf);
 393         netconn->extra_buf = NULL;
 394         netconn->extra_len = 0;
 395         if (SecIsValidHandle(&netconn->ssl_ctx))
 396             DeleteSecurityContext(&netconn->ssl_ctx);
 397     }
 398
 399     heap_free(netconn);
 400 }
 401
 402 void NETCON_unload(void)
 403 {
 404     if(cred_handle_initialized)
 405         FreeCredentialsHandle(&cred_handle);
 406     if(have_compat_cred_handle)
 407         FreeCredentialsHandle(&compat_cred_handle);
 408     DeleteCriticalSection(&init_sechandle_cs);
 409     if(winsock_loaded)
 410         WSACleanup();
 411 }
 412
 413 int sock_send(int fd, const void *msg, size_t len, int flags)
 414 {
 415     int ret;
 416     do
 417     {
 418         ret = send(fd, msg, len, flags);
 419     }
 420     while(ret == -1 && WSAGetLastError() == WSAEINTR);
 421     return ret;
 422 }
 423
 424 int sock_recv(int fd, void *msg, size_t len, int flags)
 425 {
 426     int ret;
 427     do
 428     {
 429         ret = recv(fd, msg, len, flags);
 430     }
 431     while(ret == -1 && WSAGetLastError() == WSAEINTR);
 432     return ret;
 433 }
 434
 435 static DWORD netcon_secure_connect_setup(netconn_t *connection, BOOL compat_mode)
 436 {
 437     SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
 438     SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
 439     SecHandle *cred = &cred_handle;
 440     BYTE *read_buf;
 441     SIZE_T read_buf_size = 2048;
 442     ULONG attrs = 0;
 443     CtxtHandle ctx;
 444     SSIZE_T size;
 445     int bits;
 446     const CERT_CONTEXT *cert;
 447     SECURITY_STATUS status;
 448     DWORD res = ERROR_SUCCESS;
 449
 450     const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
 451         |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;
 452
 453     if(!ensure_cred_handle())
 454         return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 455
 456     if(compat_mode) {
 457         if(!have_compat_cred_handle)
 458             return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 459         cred = &compat_cred_handle;
 460     }
 461
 462     read_buf = heap_alloc(read_buf_size);
 463     if(!read_buf)
 464         return ERROR_OUTOFMEMORY;
 465
 466     status = InitializeSecurityContextW(cred, NULL, connection->server->name, isc_req_flags, 0, 0, NULL, 0,
 467             &ctx, &out_desc, &attrs, NULL);
 468
 469     assert(status != SEC_E_OK);
 470
 471     set_socket_blocking(connection, TRUE);
 472
 473     while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
 474         if(out_buf.cbBuffer) {
 475             assert(status == SEC_I_CONTINUE_NEEDED);
 476
 477             TRACE("sending %u bytes\n", out_buf.cbBuffer);
 478
 479             size = sock_send(connection->socket, out_buf.pvBuffer, out_buf.cbBuffer, 0);
 480             if(size != out_buf.cbBuffer) {
 481                 ERR("send failed\n");
 482                 status = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 483                 break;
 484             }
 485
 486             FreeContextBuffer(out_buf.pvBuffer);
 487             out_buf.pvBuffer = NULL;
 488             out_buf.cbBuffer = 0;
 489         }
 490
 491         if(status == SEC_I_CONTINUE_NEEDED) {
 492             assert(in_bufs[1].cbBuffer < read_buf_size);
 493
 494             memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
 495             in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;
 496
 497             in_bufs[1].BufferType = SECBUFFER_EMPTY;
 498             in_bufs[1].cbBuffer = 0;
 499             in_bufs[1].pvBuffer = NULL;
 500         }
 501
 502         assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
 503         assert(in_bufs[1].BufferType == SECBUFFER_EMPTY);
 504
 505         if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
 506             BYTE *new_read_buf;
 507
 508             new_read_buf = heap_realloc(read_buf, read_buf_size + 1024);
 509             if(!new_read_buf) {
 510                 status = E_OUTOFMEMORY;
 511                 break;
 512             }
 513
 514             in_bufs[0].pvBuffer = read_buf = new_read_buf;
 515             read_buf_size += 1024;
 516         }
 517
 518         size = sock_recv(connection->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
 519         if(size < 1) {
 520             WARN("recv error\n");
 521             res = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 522             break;
 523         }
 524
 525         TRACE("recv %lu bytes\n", size);
 526
 527         in_bufs[0].cbBuffer += size;
 528         in_bufs[0].pvBuffer = read_buf;
 529         status = InitializeSecurityContextW(cred, &ctx, connection->server->name,  isc_req_flags, 0, 0, &in_desc,
 530                 0, NULL, &out_desc, &attrs, NULL);
 531         TRACE("InitializeSecurityContext ret %08x\n", status);
 532
 533         if(status == SEC_E_OK) {
 534             if(SecIsValidHandle(&connection->ssl_ctx))
 535                 DeleteSecurityContext(&connection->ssl_ctx);
 536             connection->ssl_ctx = ctx;
 537
 538             if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
 539                 FIXME("SECBUFFER_EXTRA not supported\n");
 540
 541             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &connection->ssl_sizes);
 542             if(status != SEC_E_OK) {
 543                 WARN("Could not get sizes\n");
 544                 break;
 545             }
 546
 547             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
 548             if(status == SEC_E_OK) {
 549                 res = netconn_verify_cert(connection, cert, cert->hCertStore);
 550                 CertFreeCertificateContext(cert);
 551                 if(res != ERROR_SUCCESS) {
 552                     WARN("cert verify failed: %u\n", res);
 553                     break;
 554                 }
 555             }else {
 556                 WARN("Could not get cert\n");
 557                 break;
 558             }
 559
 560             connection->ssl_buf = heap_alloc(connection->ssl_sizes.cbHeader + connection->ssl_sizes.cbMaximumMessage
 561                     + connection->ssl_sizes.cbTrailer);
 562             if(!connection->ssl_buf) {
 563                 res = GetLastError();
 564                 break;
 565             }
 566         }
 567     }
 568
 569     heap_free(read_buf);
 570
 571     if(status != SEC_E_OK || res != ERROR_SUCCESS) {
 572         WARN("Failed to establish SSL connection: %08x (%u)\n", status, res);
 573         heap_free(connection->ssl_buf);
 574         connection->ssl_buf = NULL;
 575         return res ? res : ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 576     }
 577
 578     TRACE("established SSL connection\n");
 579     connection->secure = TRUE;
 580     connection->security_flags |= SECURITY_FLAG_SECURE;
 581
 582     bits = NETCON_GetCipherStrength(connection);
 583     if (bits >= 128)
 584         connection->security_flags |= SECURITY_FLAG_STRENGTH_STRONG;
 585     else if (bits >= 56)
 586         connection->security_flags |= SECURITY_FLAG_STRENGTH_MEDIUM;
 587     else
 588         connection->security_flags |= SECURITY_FLAG_STRENGTH_WEAK;
 589
 590     if(connection->mask_errors)
 591         connection->server->security_flags = connection->security_flags;
 592     return ERROR_SUCCESS;
 593 }
 594
 595 /******************************************************************************
 596  * NETCON_secure_connect
 597  * Initiates a secure connection over an existing plaintext connection.
 598  */
 599 DWORD NETCON_secure_connect(netconn_t *connection, server_t *server)
 600 {
 601     DWORD res;
 602
 603     /* can't connect if we are already connected */
 604     if(connection->secure) {
 605         ERR("already connected\n");
 606         return ERROR_INTERNET_CANNOT_CONNECT;
 607     }
 608
 609     if(server != connection->server) {
 610         server_release(connection->server);
 611         server_addref(server);
 612         connection->server = server;
 613     }
 614
 615     /* connect with given TLS options */
 616     res = netcon_secure_connect_setup(connection, FALSE);
 617     if (res == ERROR_SUCCESS)
 618         return res;
 619
 620     /* FIXME: when got version alert and FIN from server */
 621     /* fallback to connect without TLSv1.1/TLSv1.2        */
 622     if (res == ERROR_INTERNET_SECURITY_CHANNEL_ERROR && have_compat_cred_handle)
 623     {
 624         closesocket(connection->socket);
 625         res = create_netconn_socket(connection->server, connection, 500);
 626         if (res != ERROR_SUCCESS)
 627             return res;
 628         res = netcon_secure_connect_setup(connection, TRUE);
 629     }
 630     return res;
 631 }
 632
 633 static BOOL send_ssl_chunk(netconn_t *conn, const void *msg, size_t size)
 634 {
 635     SecBuffer bufs[4] = {
 636         {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_buf},
 637         {size,  SECBUFFER_DATA, conn->ssl_buf+conn->ssl_sizes.cbHeader},
 638         {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_buf+conn->ssl_sizes.cbHeader+size},
 639         {0, SECBUFFER_EMPTY, NULL}
 640     };
 641     SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
 642     SECURITY_STATUS res;
 643
 644     memcpy(bufs[1].pvBuffer, msg, size);
 645     res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0);
 646     if(res != SEC_E_OK) {
 647         WARN("EncryptMessage failed\n");
 648         return FALSE;
 649     }
 650
 651     if(sock_send(conn->socket, conn->ssl_buf, bufs[0].cbBuffer+bufs[1].cbBuffer+bufs[2].cbBuffer, 0) < 1) {
 652         WARN("send failed\n");
 653         return FALSE;
 654     }
 655
 656     return TRUE;
 657 }
 658
 659 /******************************************************************************
 660  * NETCON_send
 661  * Basically calls 'send()' unless we should use SSL
 662  * number of chars send is put in *sent
 663  */
 664 DWORD NETCON_send(netconn_t *connection, const void *msg, size_t len, int flags,
 665                 int *sent /* out */)
 666 {
 667     /* send is always blocking. */
 668     set_socket_blocking(connection, TRUE);
 669
 670     if(!connection->secure)
 671     {
 672         *sent = sock_send(connection->socket, msg, len, flags);
 673         return *sent == -1 ? WSAGetLastError() : ERROR_SUCCESS;
 674     }
 675     else
 676     {
 677         const BYTE *ptr = msg;
 678         size_t chunk_size;
 679
 680         *sent = 0;
 681
 682         while(len) {
 683             chunk_size = min(len, connection->ssl_sizes.cbMaximumMessage);
 684             if(!send_ssl_chunk(connection, ptr, chunk_size))
 685                 return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 686
 687             *sent += chunk_size;
 688             ptr += chunk_size;
 689             len -= chunk_size;
 690         }
 691
 692         return ERROR_SUCCESS;
 693     }
 694 }
 695
 696 static BOOL read_ssl_chunk(netconn_t *conn, void *buf, SIZE_T buf_size, BOOL blocking, SIZE_T *ret_size, BOOL *eof)
 697 {
 698     const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
 699     SecBuffer bufs[4];
 700     SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
 701     SSIZE_T size, buf_len = 0;
 702     int i;
 703     SECURITY_STATUS res;
 704
 705     assert(conn->extra_len < ssl_buf_size);
 706
 707     if(conn->extra_len) {
 708         memcpy(conn->ssl_buf, conn->extra_buf, conn->extra_len);
 709         buf_len = conn->extra_len;
 710         conn->extra_len = 0;
 711         heap_free(conn->extra_buf);
 712         conn->extra_buf = NULL;
 713     }
 714
 715     set_socket_blocking(conn, blocking && !buf_len);
 716     size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 717     if(size < 0) {
 718         if(!buf_len) {
 719             if(WSAGetLastError() == WSAEWOULDBLOCK) {
 720                 TRACE("would block\n");
 721                 return WSAEWOULDBLOCK;
 722             }
 723             WARN("recv failed\n");
 724             return ERROR_INTERNET_CONNECTION_ABORTED;
 725         }
 726     }else {
 727         buf_len += size;
 728     }
 729
 730     if(!buf_len) {
 731         TRACE("EOF\n");
 732         *eof = TRUE;
 733         *ret_size = 0;
 734         return ERROR_SUCCESS;
 735     }
 736
 737     *eof = FALSE;
 738
 739     do {
 740         memset(bufs, 0, sizeof(bufs));
 741         bufs[0].BufferType = SECBUFFER_DATA;
 742         bufs[0].cbBuffer = buf_len;
 743         bufs[0].pvBuffer = conn->ssl_buf;
 744
 745         res = DecryptMessage(&conn->ssl_ctx, &buf_desc, 0, NULL);
 746         switch(res) {
 747         case SEC_E_OK:
 748             break;
 749         case SEC_I_CONTEXT_EXPIRED:
 750             TRACE("context expired\n");
 751             *eof = TRUE;
 752             return ERROR_SUCCESS;
 753         case SEC_E_INCOMPLETE_MESSAGE:
 754             assert(buf_len < ssl_buf_size);
 755
 756             set_socket_blocking(conn, blocking);
 757             size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 758             if(size < 1) {
 759                 if(size < 0 && WSAGetLastError() == WSAEWOULDBLOCK) {
 760                     TRACE("would block\n");
 761
 762                     /* FIXME: Optimize extra_buf usage. */
 763                     conn->extra_buf = heap_alloc(buf_len);
 764                     if(!conn->extra_buf)
 765                         return ERROR_NOT_ENOUGH_MEMORY;
 766
 767                     conn->extra_len = buf_len;
 768                     memcpy(conn->extra_buf, conn->ssl_buf, conn->extra_len);
 769                     return WSAEWOULDBLOCK;
 770                 }
 771
 772                 return ERROR_INTERNET_CONNECTION_ABORTED;
 773             }
 774
 775             buf_len += size;
 776             continue;
 777         default:
 778             WARN("failed: %08x\n", res);
 779             return ERROR_INTERNET_CONNECTION_ABORTED;
 780         }
 781     } while(res != SEC_E_OK);
 782
 783     for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
 784         if(bufs[i].BufferType == SECBUFFER_DATA) {
 785             size = min(buf_size, bufs[i].cbBuffer);
 786             memcpy(buf, bufs[i].pvBuffer, size);
 787             if(size < bufs[i].cbBuffer) {
 788                 assert(!conn->peek_len);
 789                 conn->peek_msg_mem = conn->peek_msg = heap_alloc(bufs[i].cbBuffer - size);
 790                 if(!conn->peek_msg)
 791                     return ERROR_NOT_ENOUGH_MEMORY;
 792                 conn->peek_len = bufs[i].cbBuffer-size;
 793                 memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
 794             }
 795
 796             *ret_size = size;
 797         }
 798     }
 799
 800     for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
 801         if(bufs[i].BufferType == SECBUFFER_EXTRA) {
 802             conn->extra_buf = heap_alloc(bufs[i].cbBuffer);
 803             if(!conn->extra_buf)
 804                 return ERROR_NOT_ENOUGH_MEMORY;
 805
 806             conn->extra_len = bufs[i].cbBuffer;
 807             memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
 808         }
 809     }
 810
 811     return ERROR_SUCCESS;
 812 }
 813
 814 /******************************************************************************
 815  * NETCON_recv
 816  * Basically calls 'recv()' unless we should use SSL
 817  * number of chars received is put in *recvd
 818  */
 819 DWORD NETCON_recv(netconn_t *connection, void *buf, size_t len, BOOL blocking, int *recvd)
 820 {
 821     *recvd = 0;
 822     if (!len)
 823         return ERROR_SUCCESS;
 824
 825     if (!connection->secure)
 826     {
 827         set_socket_blocking(connection, blocking);
 828         *recvd = sock_recv(connection->socket, buf, len, 0);
 829         return *recvd == -1 ? WSAGetLastError() :  ERROR_SUCCESS;
 830     }
 831     else
 832     {
 833         SIZE_T size = 0;
 834         BOOL eof;
 835         DWORD res;
 836
 837         if(connection->peek_msg) {
 838             size = min(len, connection->peek_len);
 839             memcpy(buf, connection->peek_msg, size);
 840             connection->peek_len -= size;
 841             connection->peek_msg += size;
 842
 843             if(!connection->peek_len) {
 844                 heap_free(connection->peek_msg_mem);
 845                 connection->peek_msg_mem = connection->peek_msg = NULL;
 846             }
 847
 848             *recvd = size;
 849             return ERROR_SUCCESS;
 850         }
 851
 852         do {
 853             res = read_ssl_chunk(connection, (BYTE*)buf, len, blocking, &size, &eof);
 854             if(res != ERROR_SUCCESS) {
 855                 if(res == WSAEWOULDBLOCK) {
 856                     if(size)
 857                         res = ERROR_SUCCESS;
 858                 }else {
 859                     WARN("read_ssl_chunk failed\n");
 860                 }
 861                 break;
 862             }
 863         }while(!size && !eof);
 864
 865         TRACE("received %ld bytes\n", size);
 866         *recvd = size;
 867         return res;
 868     }
 869 }
 870
 871 /******************************************************************************
 872  * NETCON_query_data_available
 873  * Returns the number of bytes of peeked data plus the number of bytes of
 874  * queued, but unread data.
 875  */
 876 BOOL NETCON_query_data_available(netconn_t *connection, DWORD *available)
 877 {
 878     *available = 0;
 879
 880     if(!connection->secure)
 881     {
 882         ULONG unread;
 883         int retval = ioctlsocket(connection->socket, FIONREAD, &unread);
 884         if (!retval)
 885         {
 886             TRACE("%d bytes of queued, but unread data\n", unread);
 887             *available += unread;
 888         }
 889     }
 890     else
 891     {
 892         *available = connection->peek_len;
 893     }
 894     return TRUE;
 895 }
 896
 897 BOOL NETCON_is_alive(netconn_t *netconn)
 898 {
 899     int len;
 900     char b;
 901
 902     set_socket_blocking(netconn, FALSE);
 903     len = sock_recv(netconn->socket, &b, 1, MSG_PEEK);
 904
 905     return len == 1 || (len == -1 && WSAGetLastError() == WSAEWOULDBLOCK);
 906 }
 907
 908 LPCVOID NETCON_GetCert(netconn_t *connection)
 909 {
 910     const CERT_CONTEXT *ret;
 911     SECURITY_STATUS res;
 912
 913     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
 914     return res == SEC_E_OK ? ret : NULL;
 915 }
 916
 917 int NETCON_GetCipherStrength(netconn_t *connection)
 918 {
 919     SecPkgContext_ConnectionInfo conn_info;
 920     SECURITY_STATUS res;
 921
 922     if (!connection->secure)
 923         return 0;
 924
 925     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
 926     if(res != SEC_E_OK)
 927         WARN("QueryContextAttributesW failed: %08x\n", res);
 928     return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
 929 }
 930
 931 DWORD NETCON_set_timeout(netconn_t *connection, BOOL send, DWORD value)
 932 {
 933     int result;
 934
 935     result = setsockopt(connection->socket, SOL_SOCKET,
 936                         send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&value,
 937                         sizeof(value));
 938     if (result == -1)
 939     {
 940         WARN("setsockopt failed\n");
 941         return WSAGetLastError();
 942     }
 943     return ERROR_SUCCESS;
 944 }